CVE-2018-19907: OS Command Injection in craftercms Crafter-studio Vulnerability

HIGH
Advisory Identifier: GHSA-9fcp-vcq9-9h2h
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CVSS 8.8
CWE-78
Published
Advisory Summary

CVE-2018-19907 is a HIGH (CVSS 8.8) crafter-studio vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting OS Command Injection in craftercms libraries in the Maven ecosystem. The issue involves crafter-studio. Remediation is available in the latest vendor maintenance releases.

CVE-2018-19907 at a Glance

CVE Identifier CVE-2018-19907
GHSA Identifier GHSA-9fcp-vcq9-9h2h
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product OS Command Injection in craftercms
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2018-19907

To remediate this vulnerability, upgrade all affected OS Command Injection in craftercms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.craftercms:crafter-studio fixed: Latest secure release 
<dependency>
    <groupId>org.craftercms</groupId>
    <artifactId>crafter-studio</artifactId>
    <version>Latest secure release</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.craftercms

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-19907, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.craftercms

Analyze the terminal output to locate any version of OS Command Injection in craftercms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.craftercms command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In OS Command Injection in craftercms, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A Server-Side Template Injection issue was discovered in Crafter CMS 3.0.18. Attackers with developer privileges may execute OS commands by Creating/Editing a template file (.ftl filetype) that triggers a call to freemarker.template.utility.Execute in the FreeMarker library during rendering of a web page.

CVE-2018-19907 Affected OS Command Injection in craftercms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
org.craftercms:crafter-studio
maven/org.craftercms/crafter-studio
Maven
≤ 3.0.18

References

NVD — CVE-2018-19907 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-19907
OS Command Injection in craftercms Source Repository REPOSITORY
https://github.com/craftercms/craftercms/issues/2677
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-9fcp-vcq9-9h2h
OS Command Injection in craftercms Source Repository REPOSITORY
https://github.com/craftercms/craftercms
medium.com/@buxuqua/rce-vulner... WEB
https://medium.com/@buxuqua/rce-vulnerability-in-crafter-cms-server-side-template-injection-19d8708ce242

Frequently Asked Questions

What is CVE-2018-19907?
CVE-2018-19907 is a security vulnerability in OS Command Injection in craftercms involving crafter-studio under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which OS Command Injection in craftercms versions are affected?
Affected versions include releases prior to current release patches across affected packages: org.craftercms:crafter-studio.
What version fixes CVE-2018-19907?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is crafter-studio affected?
Yes, org.craftercms:crafter-studio is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2018-19907?
CVE-2018-19907 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2018-19907?
CVE-2018-19907 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check Maven dependencies for CVE-2018-19907?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.craftercms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9fcp-vcq9-9h2h",
  "modified" : "2022-09-14T22:12:13Z",
  "published" : "2018-12-19T19:24:18Z",
  "aliases" : [ "CVE-2018-19907" ],
  "summary" : "OS Command Injection in craftercms:crafter-studio",
  "details" : "A Server-Side Template Injection issue was discovered in Crafter CMS 3.0.18. Attackers with developer privileges may execute OS commands by Creating/Editing a template file (.ftl filetype) that triggers a call to freemarker.template.utility.Execute in the FreeMarker library during rendering of a web page.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.craftercms:crafter-studio"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.0.18"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-19907"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftercms/craftercms/issues/2677"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-9fcp-vcq9-9h2h"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftercms/craftercms"
  }, {
    "type" : "WEB",
    "url" : "https://medium.com/@buxuqua/rce-vulnerability-in-crafter-cms-server-side-template-injection-19d8708ce242"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:28:17Z",
    "nvd_published_at" : null
  }
}